Re: [PATCH/RFC] replace get_scheduled_cycles with sched_clock paravirt_op

[Zachary Amsden]

Jeremy Fitzhardinge wrote:
> Subject: Add a sched_clock paravirt_op
>
> The tsc-based get_scheduled_cycles interface is not a good match for
> Xen's runstate accounting, which reports everything in nanoseconds.
>
> This patch replaces this interface with a sched_clock interface, which
> matches both Xen and VMI's requirements.
>
> In order to do this, we:
>    1. replace get_scheduled_cycles with sched_clock
>    2. hoist cycles_2_ns into a common header
>    3. update vmi accordingly
>
> One thing to note: because sched_clock is implemented as a weak function in
> kernel/sched.c, we must define a real function in order to override this weak
> binding.  This means the usual paravirt_ops technique of using an inline
> function won't work in this case.
>   

Acked-by: Zachary Amsden <zach@xxxxxxxxxx>


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